Pump for motor vehicles



mmh 24. 1925.

G. M. C'LGETT PUMP FOR MOTOR VEHICLES original Filed .my 1s, 1922 2 sheets-sneek 2 Patented Mar. 24,

UNITED STATES PATENT oFFicE. i

GEORGE -MAXWELL CIiAG-EiTT,V OF UPPER MRLBORO, MARYLAND, .AS SIGII'OR 'IO GEORGE CLAC'ETT vMANUFACIIIRII'Gi- COMPANY, OF `WASHINGTON, DISTRICT 0F COLUMBIA, A FIRM CONSISTINGIOE GEORGE D. CLAGETT AND GEORGE M. CLAGETT.

PUMP FOR MOTOR VEHICLES.

`Applicatrm `filed. July 13, 1922, Serial No. 574,675. Renewed January 4, 1924.

enact description of the invention, such'as will enable others skilled in the art to which i it appertains to malte and use the same.

The pump forming the subject matter of mv resent invention has been designed nril) s l marily for attachment to motor vehicles as a tire pump and to'be operated by a moving part of the engine, but it will be understood that the invention is capable of other adaptations.

It has been heretofore proposed -to apply mechanically operated air pumps to motor vehicles and to employ a moving part of an engine as an actuating means for such pumps. These pumps have enjoyed vbut very limited commercial success and have not been extensively used because of the more or less complicated means employed for actuating the pump plunger which means commonly includes a number of parts which soon become loose and rattle or which include more or less fragile elements which. soon become damaged and refuse to function properly. e. number of types'of vehicle air pumps must be detached from the vehicle when not in use and this is obviously a very obj ection ablefeature.V My invention, therefore, contemplates the provision of a pump which will be available for use as ai vehicle engine driven air pump and one `which involves but few parts in compact association for overcoming jthe aforementioned objections. dditionally, it is my aim to furnish a pump which may be set inoperation at any time while the vehicle engine is running', a novel and improved means being employed for stoppingthe pumping operation andretaining the pump in inoperative position, which means may by the use of a novel pressure responsive device be rendered automatically effective when a predetermined pressure has been created in a tire.

A further object of this invention is the provision of a novel and improved support for the pump cylinder including a fixed .member which cooperates with an oscillatory plunger actuating member for holding the pmnp'cylinder and associated elements iny proper position, yet at the same time being so arranged as to permit ready detachment of the cylinder for purposes of inspection without necessitating the tampering with or manipulation the mechanism.

Various simple and effective means are availed of for assuring a proper cooperation of the pump actuating member with a driven elementof the engine.

- The various features of novelty which. characterize my invention are pointed out with particular-ity in the claims annexed to and forming a part yof this specification. However, in order that the invention may be better understood, reference should be had to the accompanying drawings and deof other portions of Y scriptive matter which set `forth what I now regard as a preferred structure, it'being understood, however, that aV multiplicity of changes and variations may be made therein within the spirit and scope of the claims.

In the' drawings,

, Figure 1 is aside elevation embodying my improvements applied to a motor vehicle engine; FigsQ, 3, 4 and 5 are sections, respectively, on the lines 2 2, 3v-3, t*l and 5 5 of Fig. l; and Fig. 6 is a sectional view takenk onV line 6-6 of 2. l

Referring specifically tothe drawings, wherein like reference characters have been used to designate similar parts throughout all views, numeral l denotes a bracket or casting adapted to be secured to theforward end of the vehicle engine adjacent the fan by means of 4bolts 2 and 2a, which also serve in the well known Ford and other makes of cars for holding thefront cover plate of the engine housing in place. It will be noted, therefore, that thev attachment of mybracket l obviates the necessity of drilling additional bolt holes in the engine front and necessitates the yuse of no bolts or fasteners other than those havingV a normal function in the' engine assembly.'v

Y An oscillatory lever 5 is fulorumed in the bracket land its function, briefly stated, is to convert the `rotary movement of a cam member into yoscillatory movement for working the plunger of the. pump, one arm 5 of. said lever havingnormal con- -tact with the cam Vthrough the medium of an eccentric roller 7 in its end, while the CIK other arm 5b engages the outer end of the pump plunger. I have shown in the drawings an acceptable application of the cam 6, thesame being cerried by the fan belt pulley #l upon the crank shaft 3. Itwill be understood,however, that the cam disk 6 may be keyed or otherwise Vsecured toV the crank shaft as may be found expedient. rlhe roller 7, as intimated, is journaled upon aV bea-ded stub shaft' 8 inserta-ble through an aperture in the end of the arm 5a, a nut 8a threaded on the shaft holding a shoulder of said shaft against said arm. A tension washer 8b encompasses the aforementioned shoulder, being Vinterposed between the arm 5a and the 'roller r7 and having a seat in a shallow circumferential groove in said arm as shown in Figure 1. Thus the nut 8a having been tightened to cause the shoulder Sc'to bind against the arm 5, it will be evident that the'tension washer 8b will now bear against the roller 7 with enough f orce to 'hold' the same against spinning when out of contact with the cam 6, but not so tight as, to prevent rotation of the roller when in contact with the cam. yThe roller 7 serves to reduce friction andthe reason for the eccentric character thereof 'will' be apparent hereinafter. Spring washer Sb also, of Course, Yholds the nut 8a tight.

1t is essential that the parts be capable of ready adjustment to assure a proper contact between the. eccentric iroller Tand the cam disk 6, and to this' endrender the lever adjustable ina vertical plane by employing, as a fulcrum pointtliere'for.`

the medial eccentric portionof a bolt'91` This blot 9 extends through the bracket and a pin 10 is provided extending transversely therefrom to yserve as an indicator of the position of the eccentric Iportion and also as a handle for turning the bolt for moving the lever bodily to a desired `position and adjustment with respect to the cam disk 6 and the pump cylinder.

` The pump proper is indicated-generally at 12, and its cylinder `Y1.3 is freely supported bracket 1, which, as shown, is formed with a recess 1st, while theV casting below the bottom of the cylinderl 13 is provided with a notch whose walls" strald'dle 'the re- Vcess 1er-as clearly shown in Figs; 1 and 5.

its a consequence V`it will be appreciated that there is ample range of movement of the cylinder with respect'to its support.`

The piston has its rodV 16 extending through the top of the cylinder and the extremity of this piston rod 16 "is formed with a convex head 17 which is adapted to be received within the cupped portion 18 at the end of the lever arm 5b. spring 19 which is preferably of conical form fis coiled around the piston rod 16,'

for universal movement "on the one end bearing upon the top or head of the cylinder, which by the way is removable and held in place by the spring, while the other or apex end of the spring abuts against-the convex head 17 at the end of the rod 'to holditin thecup 18 of the arm 5b.' f i As willbe apparent the spring 19 functions, both while the pump is in operation and at rest, to demou'ntably maintain the same in association with the Vbracket 1 and the arm 5b, by normally pressing the piston rod head 17 into the cupv 18 of the arm '5"` and at the same time pressing the cylinder against the bracket 1 to retain its notch in thebracket recess 1e.

Additionally `it should here be emphasized' that the spring 19 serves to return the piston to its elevated or starting position after each working impulse from the arm 5b, this upward pressure of the spring alsoA acting through the piston rod head 17, cup 18 and arm 5b to normally maintain the eccentric roller 7 of the arm 5 in frictional contact with the cam 6 and4 to prevent rattling of the parts.

` In connection with the convex piston rod head and the cupped end 1S of the arm 5b it will be observed that-here again is aV universal connection which permits the whole pump12 to b e readily tilted to conform tothe positionof the lever 5, and further when it is desired to remove the pumpv 12 from its location it is only necessary 'to vcompress the spring 19 and plunger 16k to disengage the convex head 17 from the cup 18 whereupon vthe pump 12 may berlifted out very conveniently for exainination or adjustment.

` To the end that the lever 1 may be rlocked and effectually maintained in ineffective pcsition'when the pump is not to be used. I have provided a locking mechanism which in'thel illustrated form embraces a sleeve Q0 which'isv formed-upon the bracket 1 adjacent the arm 5" of the lever. A trigger controlledpin 21 is movable in this sleeve 2O and its 'conical end is normally' urged by aY s'pring'22'to bear upon the arm 5b for holding the same depressed. This pin urged by lthe spring 22, cooperates with. the

roller7, which isfeccentric, to automatically lock the lever 5 sopthat the'roller 7 is completely V'out ofengagement with the cam 6. AThis takes place when the high points of theroller and cam co-mej'together in the course of movement. When the cam and roller .are in this position, the pin 21 upon being released movesv forward over the lever 5, to its maximum point Vof travel for holding the lever Yarm 5P depressed against the tension of the spring 19. The high point ofthe cam 6 in the course of movement comes. in contact with the high point of the roller, urging it forwardand lli() Lthus causlng a lower point of the roller to be presented towards the cam7 it being remembered that the tension washer 8b will prevent further rotation of the eccentricl roller 7.

I also provide means for retractingv the pin 21 and holding it against the pressure ot' the spring 22 by means of a trigger device, and as I prefer that the pin be automatically released at a predetermined air pressure, I provide to that end a housing. 23 having an upright portion which as shown is mounted upon the sleeve 20. This'upright portion 24 is transversely bored as at 25 and has a longitudinal recess 26 connected with a narrow passage leading from the bore. A cylinder 27 has a depending boss 28 tapped in the recess`26. In this cylinder there is provided a. piston 29 having a rod 29a one end of which passes through a longitudinal bore in the boss. A ball valve 30 governs the passage of air into the recess 26'fro`m the bore 25 and a spring 3l of conical form has its reduced end normally bearing upon the ball while its other end contacts with the end of the boss 28. The cylinder 27 may thus be turned inward or outward to increase or lessen the tension of the spring 31 acting upon the ballvalve 30 and thereby determine the amount of air pressure necessary Ato raise the ball and permitair to entery the recess 26 for acting upon the plunger 29 to release the latch mechanism 21 as will be hereinafter apparent. y

There is supported upon the upper end of the cylinder 27 for vertical sliding movement a cap assembly 32 which, as shown7 comprises two plates spaced apart at their centra-l portions, the lower plate being centrally apertured vto create a bearing for the piston rod 29a, while the upper plate has a recess 33 to receive the extremity of the rod.l Thus it will be appreciated that elevation of the plunger 29 with its rod 29aM will result in the elevation of the cap assembly 32 whereby a latch member having a tendency for outward movement will be released from an annular groove 34 provided inthe under surface of the cap assembly 32.

The sleeve 2() is formed with an. inward flange 36 at its outer open end, and as shown at 37 in Fig. 2 a plunger is Vattached to the pin 21 and projects fromv the open end of the sleeve 20. This plunger 37 may be projected by any appropriate device. the

same being of channeled formas shown in Fig. 6. lUpon its transverse pin 38. is fulcrumed a trigger 39 formed with a hook 40 at its inner end and having its outer eX- vtremity beveled. 4 Y

While the pin 21 is holding the leverl 5 looked, Vthe trigger lies within the channel of the plunger 37 and both extend into the sleeve 20. As the plungerf37 is retracted carrying A'with it 'the pin 217 the trigger travels along with it lying flatly in tlie channel until the hooked end 40 engages the-flange 36 at the end of the sleeve whereupon it is caused to swing upward on its pivot pin 38. This upward movement of the trigger 39 results in t-he contacting of the beveled extremity thereof with the' up wardly beveled circumferential flange 35 of the capv assembly 32 adjacent the groove 34 and the consequent-raising of the 'cap assembly to permit the end of the trigger to seat inthe groove 34. ln this movement the cap moves Vslightly upward and tilts to one side, it being here noted that the plunger 29a is provided with a shoulder or enlargement 29b between the two `plates of the cap assembly to prevent displacement of the same.

With the parts in the position of Fig. 2, the lever 5 is released and free to work the 'pump when the engine is started.

Referring novi7 to Figs. 1 and 5, the cylin' der 13 has a small offset 41 at its base through which the compressed air passage 42 leads to a tube'43, an adjustable ball check valve, 44 being employed in connection with thepassage 42 to prevent the escape of air from the tube while the piston is returning from a working stroke.

` The parts being in the positions of Fig. 9, the pumpV 12 is working and the air is being forced through tube 43 and housing 24 to a tire, the motor vehicle being standing while its engine is running. Then the pressure reaches the point for which spring -31 is set the ball 30 rises and allows the air to force piston 29 upward, the piston rod entering recess 33. This lifts the cap 32 straight up thus releasing the trigger 39 and allowing it to fall into plunger 37 as the two are drawn into sleeve 2O under the ten sion of spring 22. This projects pin 21- over lever arm 5b and locks the lever lagainst movement.

A feature of the tube 43 is thatit acts as a reservoir whichV stores up enough elastic air to render the supply partially independent of lthe pump action. But for this feature one compression stroke of the pump might unseat ball 30and release the trigger before adequate air had been supplied to the tires.` v

By the structure. described it will be seen that I have provided a practical pump that Vcan be installed without the `necessity of lining up.7 and fitting andat the same time one thatmay be readilyV and without difficulty taken apart.

I claim yas vmy invention 1. Ina pump for motor vehicles, a crank shaft forming part ofthe car mechanism,

a cam on said shaft, a bracket'secured to the engine frame, a lever fulcrumed-on said bracket, an eccentric roller mounted on one. s

end ofthe lever,` a cylinder mounted on said bracket and having a piston rod engaging' the opposite end of said lever, and means for locking said lever to stop the operation of the pump. p

2. In a pump for motor vehicles, a crank shaft forming part of the car mechanism, a cam on said shaft, a bracket secured to the engine frame, a lever fulcrumed on said bracket, a frictionally heldv eccentric carried by one end of said lever, a` cylinder supported by said bracket and having a pistonV means for locking said lever to stop thev operation of the pump.

4f. In a pump for motor vehicles, a crank shaft forming part of the car mechanism, a cam on said shaft, a bracket secured to the engine frame, a lever fulcrumed on said bracket, a cylinder universally supported by said bracket, a piston rod removably supported Within the cylinder and engaging one end of said lever, a frictionally held roller carried by the opposite end of the lever and engaging the cam, and automatic means for locking said lever to stop the operation of the pump.V

5. In a pump for motor vehicles, a crank shaft forming part of the car mechanism, a cam on said shaft, a bracket secured to the engine frame, a lever fulcrumed on said bracket, a Vcylinder having a forked end straddling the bracket for removably and universally supporting the same, a'piston removably supported in the cylinder and having a piston rod having a universal engagement With one end of said lever and the opposite endof the lever engaging the said cam, and automatic means 'for Ylocking said lever tostop the operation of the pump. 6. In a motor vehicle', a pump, means for actuating said pump by the vehicle engine, a spring pin tending to lock said pump actuating means, means for retracting said pin to render -it ineffective, a tube leading from said pump to a point of use, and means located in the line of said tube andoperated by the pressure for releasing said'pin.:

7 In a pumpfor motor vehicles, a crank shaft forming part ofthe car mechanism, a cam on said'shaft, a bracket'secured to the engine frame,y a lever fulcrumedV on said bracket, a frictionally held eccentric roller supported by one end of the lever, a cylinder having a forked projection straddling one a crank shaft forming' part of thecar mechanism, acain on said shaft, a bracket secured to the engine frame, alever intermediately tulcrumed on said bracket an eccentric roller` rotatably mounted upon one end of the lever, a frictional means Vfor preventing the roller from spinning on the lever, a cylinder universally supported by one end of the said bracket, a. head loosely closing the upper end of the cylinder, a piston rod extending through the head and vhaving at its upper end a universal conrection with the opposite end of the lever, a spring surrounding the piston rod between the head and the lever, and automat-ic means for locking said lever to stop the operation of the pump.

9. In a pump for motor vehicles, a crank shaft forming part ofthe car mechanism, a cam on Vsaid shaft, a bracket secured to the engine frame, a lever adjustably fulcrumed on said bracket, an. eccentric-'roller carried by one' end of said lever and held against spinning, a cylinder supported by said bracket and having a piston rod engaging the opposite end of said lever, and

means for locking said lever to stop the operation of the pump. 10. In a pump for motor vehicles, a crank shaft forming` part of the car mechanism, a cam on said shaft, a bracket secured to the engine frame, a lever fulcrumed on said bracket, a frictionally held eccentric carried by one end of said lever, a cylinder freely supported by said bracket, a piston rod Working Within the cylinder and engaging the opposite end of said lever, and-means for locking said lever tostopthe operation of the pump. i

11. In a pump for motorvehicles a crank shaft vforming part of the car mechanism,

a cam on said shaft, a bracket secured to the engine frame, a lever adjustably fulcrumed on the engine frame, a. frictionallv held eccentric carried by one end of said lever, 'a cylinder freely supportedv by the engine frame and having a piston rod engaging the opposite end of said Alever and `means for locking said lever to stop the operation of the pump.v

12. In a pump for motor vehicles, a crank .shaft forming part of the car mechanism, a cam on said shaft, arbracket secured to the engine frame, a lever adjustably fulcrumed on said bracket, a frictionally held eccentric carried by one end of the lever,

a cylinder freely supported -by said bracket, a piston rod working in the cylinder and freely engaging the opposite end of the lever, a spring surrounding the piston rod and having one end engaging the cylinder head and the opposite end engaging the piston rod and holding` it against thelever whereby the eccentric is held in engagement with the cam and the cylinder held onth bracket. f

' 13. In a pump for motor vehicles, a-crank shaft forming part of the car mechanism, a cam on said shaft, a bracket secured to the engine frame, a lever adjustably ful# crumed on said bracket, a cylinder universally supported by said bracket, a piston rod removably supported within the cylin* der and engaging one 4end of said lever, a frictionally held roller carried by the opposite end of said lever and engaging the cam and automatic means for locking said lever to stop the operation of the pump.

14. In a pump for motor vehicles, a crank shaft forming part of the car mechanism, a cam on saidshaft, a bracket secured to the engine frame, a lever adjustably fulcrumed on said bracket. a. cylinder universally supported by` said bracket, a piston, a piston rod removably supported within the cylinder andengaging one end of said lever, a fricticnally held roller carried by the opposite end of the lever and engaging the cam, automatic means for locking the said lever to stop the operation of the pump,

and means for manually releasing said lock ing means.

15. In a pump for motor vehicles, a'crank shaft forming part of thecary mechanism, a cam on said shaft` a bracket secured to the engine frame, a p-ivonted lever adiustably mounted on said bracket. an eccentric roller mounted on one end ofthe lever, acylinder mounted on said bracket and having a piston rod engaging the opposite end of said lever, and means for locking said lever to stop the operation ofthe pump.

16. Ina pump for motorvehicles, a crank shaft forming part of thecar mechanism, a cam on said shaft, bracket secured vto the engine frame, a lever adjustably mounted on said bracket,`a cylinder freely seated on said bracket, a piston rodA working in the cylinder and, universally seated at the opposite end of the lever.

17. Ina ump for motor vehicles, aA crank shaft forming part of the car mechanism, a cam on said' shaft, a bracket secured to the engine frame, a lever adjustably mounted on said bracket, a cylinder freely seated on said bracket a piston rod' working in the cylinder Vand engaging the opposite end of thelever, anda spring 'surrounding the piston rod and having one end engaging the cylinder head and the opposite end engaging the piston rod and holding it againsty the lever whereby the eccentric is held in engagement with the cam and cylinder and piston rod held seated.

18. In a pump for motor vehicles, a crank shaft forming part of the car mechanism, a cam on saidl shaft, av bracket secured to the engine frame, a pivoted lever adjustably mounted on said bracket, a spring tension eccentric roller mounted on one end of the lever,` a cylinder mounted on saidbracket and having a piston .rod universally en# gaging the opposite end of said lever, and means for locking said lever to stop the operation of the pump.

19. In a pump mechanis a crankshaft, forming part of the car mechanism, a cam on said shaft, a rocker arm adjustably fulcrumed, a frictionally held eccentric roller, i.

carried bv one end of said rocker arm, a freely seated cylinder, a piston rod within the cylinder, a sp-ring interposed between the cylinder and the head of said piston rod to cause the eind of said pistonrod to bear against its` seat on said rocker arm.`

v 20. In a pump'mechanism, a crank shaft forming part of the car mechanisnna cam on said shaft, a bracket secured tothe engine frame, a rocker arm adjustably fulcrumed, a frictionally held eccentric roller carried by one end of said rocker arm, a cylinder freely seated on said bracket, a piston within the cylinder, a. piston rod carried 1 i 21. Inv a pump mechanism, a rocker varm fulcrumed, a frictionally held eccentric roller carried by said rocker farm, a cylinder freely supported, a piston within the cylinder, a piston rod carried by the piston and entendk ing out through a Vfreely7 seated cylinder head`r a `spring interposed between the cylinder head and-the free end of the piston rod and means to vari ably adjust said mechanism to an actuating means. v c

4227. In a pump mechanism a crank shaft forming part of the car mechanism, a cam on said shaft, a bracket secured to the ,en-1 gine frame, a rocker arm adjustably fulcrumed on said bracket, a frictionally` held eccentric roller carried by one end of said rocker arm, a cylinder freely seated on said bracket, a cylinder head freely seated onsaid cylinder and carrying a piston rod .fitted said bracket, a cylinder heady freely seated vwith a piston, means interposed between the fitted with a piston, spring means interposed between the piston head and said cylinder Vhead and means to variably adjust said mechanism to an actuating` means.

24. In a pump mechanism, a crank shaft forming part ot' the car mechanism, a cani thereon, the combination of a bracket, a rocker arm thereon,` a cylinder assembly consisting of a cylinder, a freely supported head thereon, a piston rod supported by saidV head and having a piston thereon, said assembly being supported by said bracket and said rocker ai'm and means for variably adjusting said combination to the action of said cam. K

25. InY a pump mechanism for motor vehicles, a lever fulcrumed on a support, an

eccentric i'oller mounted on said lever and means to prevent said eccentric roller from spinning freely, a cylinder universally and freely seated on a support, a cylinder head seated against said cylinder and carrying a piston rod fitted with a piston, said piston rod being. universally seated against said lever, means interposed between the head of said piston rod andsaid cylinder to cause said cylinder to bear against said support, to cause said cylinder headto bear against said cylinder and to cause the head of said piston rod to bear against said lever. means to automatically lock saidlever to hold it in operation and means to variably adjust saidY mechanism of an actuating means.

26. In a pump mechanism a crank shaft forming part of the car mechanism, a cam on said shaft, a rocker arm adjustably fulcrumed, a frictionally. held eccentric roller, carried by one end of said rocker arm, a

VJfreely seated cylinder, a piston rod Within the cylinder, a spring` interposed between the cylinder and the head of said piston rod to cause the end of said piston rod to bear against its seat on saidrocker arm, and means to reciproca-te the stroke of' said piston. 1 o Y n Y Y 27. The combination with a .pump including a cylinder and a reciprocatory piston; of a support upon which said cylinder is freely supported, an actuating member connected With said piston, and resilient means interposedbetvveen said member and said cylinder cooperating` with said support for retaining the cylinder in position.

2S. The combination with a pump including a cylinder and a reciprocatory piston of a support for frictionally supporting said.

cylinder foruniversal movement, and actuating means cooperating` With said piston Jfor reciprocating the saine and cooperating Withsaid cylinder and support for removably maintainingthe pump in position.-

29. The combination with a pump includkinor a c linder a removable head and a reciprocatory piston having a plunger rod extending through said head; of a support ior freely ,supporting said cylinder, a mechanically -operated member having frictional engagement with said plunger rod and movable to engage a driven element for reciprociprocating said piston and cooperating with said cylinder for removably positioning the same upon its support, driving lmeans for said piston reciprocating means, and pressure-.controlled -ineans for disconnecting said piston actuating means from said driving means.`

31. In a pump for motor vehicles incarried Within, said cylinder 'and having a plunger rod :extending therefrom, the combination of a support upon which said cyl- Vcluding a cylinder, a reciprocatory piston Y inder freely rests, alever fulcrumed on said support and cooperating with said plunger rodV tor-retaining the cylinder seated on the support, variable means :tor moving said lever toY operative engagement With a moving part of thevehicle engine `for re-` ciprocating said plunger rod and. piston. and means for` yieldably urging said lever in the direction of the moving part aforementioned. Y

i 32. In a pumpfor motor vehicles including a cylinder, a reciprocatory piston carried Within said cylinder and having a plunger rod extending therefrom, the combination of a support upon which said cylinder 4'freely rests, a lever fulcrumed von said support and cooperating :with said plunger rod jfor retaining the cylinderV seated on the support, variable means' for moving said lever :to Aoperative kengagement with a moving part of the vehicle engine for reciprocating said plunger rodk and piston, `means Jfor Vyieldably7 u-rging. said lever in the direction of the moving part aforementioned, and means for automatically lockingsaid- `lever out of engagement with said moving part atx-a `predetermined time.

In -axpump mechanism for motorvehicles, a crank shaft'forming -a partv ofthe car mechanism,a pulley keyed to said shaft, a cam on said pulley,the combination of a bracket', a rocker arm thereon, 'a cylinder assembly freely supported upon said ibracket and consisting of a cylinder, a freely supported head thereon,-a piston rod 'extending through said headand having an abutment at its outer end, means interposed between the abutment of` said-'piston rod4 and the cylinder head cooperating with said lever to cz use said cylinder to bear upon its seat upon said bracket, the remote portion of said lever cooperating With said cam whereby the level' Will be oscillated, and means for locking said cylinder assembly in a position at which said lever will be out of engagement With said cam.

Bil. In a pump mechanism for motor vehicles, a support, a pump actuating lever fulcrumed upon said support, a roller mounted on said lever, means to prevent said roller from spinning freely, a cylinder seated upon said support, a cylindery head freely supported by said cylinder, a piston Within said cylinder' having a rod extending through said cylinder head, an enlargement at the outer end of said piston rod and having a universal seat against said lever, means interposed between the cylinder head and said rod enlargement, cooperating with said lever to cause said cylinder to bear against its'seat on said support, means to variably adjust said mechanism to an actuating means and means to automatically lock said mechanism out of engagement with an actuating means.

` 35. ln a pump mechanism for motor vehicles, a support, a` pump actuating lever fulerumed on said support, a roller mounted on said lever, means to prevent said roller `from spinning` freely, a cylinder freely seated on said support, a'cylinder head freely supported by said cylinder and carrying a piston rod fitted With a piston, the piston rod being also provided with an enlargement at its outer end, means interposed between the cylinder head and said piston rod enlargement to causethe latter,

to bear against the lever, the latter having a seat to receive the same, means to automatically lock said mechanism out of engagement With an actuating means, and means to variably adjust said mechanism to an actuating means.

36. In a pump mechanism, a support, an Y actuating` lever fulcrumed on said support, a roller mounted on said lever, means to prevent said roller fromspinning freely, a cylinder seated against said support, a cylinder vhead freely vsupported by said cylinder and carrying a piston rod fitted vvith a piston andk having a head at its outer end, means interposed between said rod head and said cylinder head to cause the latter to bear against its seat in said cylinder, means to variably adjust said mechanism to associate said lever With a driving means, and means to automatically lock said mechanism in position to maintain'said lever out of engagement with a driving means.

37. The combination with an oscillatory member and a rotary cam driving meansy therefore with which said member has normal contact; `of an eccentrically mounted 1 roller .carried by said oscillatory member and forming the Contact AWith said cam means, and means for preventing said eccentric roller from spinningk freely When out of contact with said cam means.

y38. The combination defined in claim 38 and including means actuatable for maintaining said oscillatory member stationary When the high points of said cam means and roller come together.

In testimony whereof I have signed this specification. Y i

GEGRGE MAXWELL CLAGETT. 

